U+1D47A "𝑺" Mathematical Bold Italic Capital S Unicode Character

U+1D47A "𝑺" Mathematical Bold Italic Capital S is a stylized letter S belonging to the Mathematical Alphanumeric Symbols block, designed for use in mathematical and scientific notation to represent variables, vectors, or sets with a distinct bold and italic appearance. It was introduced as part of Unicode 3.1 in March 2001 to provide a dedicated encoding for the many typographic variants needed in complex formulas, ensuring that the letter S can be displayed or processed without relying on font-based formatting alone. This character is visually similar to the ordinary capital S but carries semantic meaning, aiding in the precise representation of mathematical expressions across different software and platforms.

General Properties

Code Point	U+1D47A
Version Added	3.1
Name	Mathematical Bold Italic Capital S
Block	Mathematical Alphanumeric Symbols
General Category	Uppercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Font
Decomposition Mapping	"S" U+0053 Latin Capital Letter S

Encodings

HTML Decimal Encoding	𝑺
HTML Hex Encoding	𝑺
UTF-8 Encoding	0xF0 0x9D 0x91 0xBA
UTF-16 Encoding	0xD835 0xDC7A
UTF-32 Encoding	0x0001D47A
C/C++/Java Escape	\ud835\udc7a

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
Uppercase	Yes
Cased	Yes
Changes When NFKC Casefolded	Yes
NFKC Casefold	"s" U+0073 Latin Small Letter S
NFKC Simple Casefold	"s" U+0073 Latin Small Letter S
Script	Common
Script Extensions	Common
Indic Syllabic Category	Other
ID Start	Yes
XID Start	Yes
ID Continue	Yes
XID Continue	Yes
Alphabetic	Yes
Math	Yes
Other Math	Yes
Vertical Orientation	Rotated
Grapheme Base	Yes
Grapheme Cluster Break	Other
Word Break	Alphabetic letter
Sentence Break	Upper